Printing-machine



(No Model.) 2 Sheets-Sheet 2. M. UMBDENSTOOK.

PRINTING MACHINE.

5 Jj a/Zfw? O.// lml w M L o Patented Aug. 27, .1889.

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' UNITED STATES PATENT OFFICE.

MICHAEL UMBDENSTOOK, OF CHICAGO, ILLINOIS.

PRINTING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 409,885, dated August27, 1889.

Application filed December 10, 1888. Serial No. 293,228. (No model) Toall whom, it may concern.-

Be it known that I, MICHAEL UMBDEN- STOCK, residing at Chicago, in thecounty of Cook and State of Illinois, and a citizen of the UnitedStates, have invented a new and useful Improvement in Printing-Machines,of which the following is a specification, reference being had to theaccompanying drawings, in which- Figure 1 is a perspective of anordinary power printing machine to which my improvement has beenapplied. Fig. 2 is a view of so much of the machine as is necessary toshow my attachment and illustrate the movement of the frisket. Fig. 3 isan enlarged detail of the frisket.

Prior to the making of my invention it was necessary in printing tintsand pictures by means of a power-press to have the plate of the exactsize of the tint or picture.

The object of my improvement is to provide an attachment for the machineby the use of which tints and pictures of different sizes can be printedwithout having the plates of the exact size of the tint or picture,which I accomplish by providing a movable frisket to cover so much ofthe plate as is not required, as illustrated in the drawings andhereinafter fully described. I

That which I claim as new will be pointed out in the claims.

My improvement is primarily designed to be used for printingphotogravures and tints, but may be used for other purposes.

In the drawings, A represents part of a power printing-machine such asis in common use.

B is the cylinder of the machine.

0 represents the sliding bed, supported upon side pieces D, which movein guideways, as As shown, the bed 0 is countersunk; but the countersunkportion is filled with pieces of metal a or other suitable material.

b is a plate of glass or other suitable material, from which theprinting is done, which plate is secured to the bed in any well-knownmanner, the fastenings for this purpose not being shown in the drawings.

0 are the usual inking-rollers.

Thus far the parts described are all old.

(1 are brackets, one of which is secured to the front end of eachsliding piece D. The upper end of each bracket is, as shown, enlargedand provided with two eyes.

6 is a cable, which is connected at one end with one of the brackets d.This cable passes over the pulleys f g h, terminating, as shown, at 11,where it is provided with a hook j.

is another cable, similar to e, one end of whichis connected with thebracket 011 the other side of the machine and at the forward end of thestrip corresponding with D. This cable extends over pulleys, and isprovided at the other end with a hook l.

m m are two strips of leather, one end of each of which is connectedwith one of the brackets d and the other end with one of the hooks j Z.

n is a bar connected to the leather strips on. The strips on areprovided with a series of holes. (See Fig.

o are two thin strips of sheet-brass, the ends of which are secured tothe strips of leather m.

p are two other strips of thin brass, also secured to the pieces ofleather m.

(1 are two other strips of thin brass, which are connected at their endswith the strips 0.

r are strips of paper secured to the bars p and q.

The device shown in Fig. 3 and on a smaller scale in Fig. l, and whichfor designation I letter F, is, in effect, a frisket.

The spaces 8 between the strips q and the pieces of leather on are to becovered with paper, and the spaces 25 are to be covered in the samemanner.

The pieces 12 and q can be adjusted, as may be desired, nearer to orfarther from each other.

a is a guide-roller.

The frisket is so arranged that it registers properly with the plate I).

The devices by means of which the bed is operated and moved to and frobeneath the cylinder are not shown, but are to be the same as those nowin common use for that purpose.

The pulleys which are connected with the machine and over which thecables pass are supported by brackets, which can be adjusted so thatproper tension can be put upon the cables.

In use the frisket will be moved automatically by the movement of thecables as the bed moves, and as the bed passes under the cylinder thefrisket will be brought over the plate I), and only those portions ofthis plate which are not covered by the frisket will come in contactwith the paper which is receiving the impression.

The frisket, as shown in Fig. 3, is designed to be used in printing fourseparate pictures. By removing the paper strip 4' it will be adapted foruse in printing a single picture.

It is common to print a tint on a sheet, the tint covering much morespace than the picture, and after that to print the picture upon thesame sheet, which then will be surrounded by a tint. By the use of myattachment the tint and the picture can be printed from the same plate,the frisket being first so arranged that so much of the plate as is toreceive the tint color will be exposed when the frisket is over theplate, and after the tint has been printed on the sheet changing thefrisket so that only so much of the plate will be exposed as is requiredfor printing the picture. As the strips 0, p, and q are made of thinmetal, it will be advisable to cut out portions of the tympan, so as tomake shallow recesses therein to receive such metal strips to preventthem from making an impression on the sheet which is being printed.

I do not confine myself to the use of leather strips m. Any suitablematerial may be used in their place which has sufficientflexibility andnon-elasticity. These pieces pass constantly back and forth beneath andover the roller u, and they should be made of material which will notstretch. The cables and strips on m must be under suitable tension whilein use, so that the frisket will constantly register with the plate I).This plate may be made of any suitable material, and type might be usedwith the bed 0 and with my frisket.

The frisket may be provided with any suitable number of openings,according to the number of pictures to be printed at the same time, andsuch openings may be square, round, oval, or irregular in shape.

That which I claim as new, and desire to secure by Letters Patent, is asfollows:

1. In combination with the sliding bed of a printing-press, a frisketconnected by cables with such bed, substantially as and for the purposespecified.

2. A frisket consisting of side pieces, as m m, and adjustable straps,in combination with cables connected with the frisket and with thesliding bed of a printing-machine, substantially as and for the purposespecified.

3. The combination of the sliding bed of a printing-press, a frisketconnected with cables, and pulleys over which the cables run,substantially as and for the purposes specified.

4. In combination with the sliding bed of a printing-press, a flexiblefrisket connected with the sliding bed by means of cables, and aguide-roller a, substantially as and for the purposes specified.

MICHAEL UMBDENSTOCK.

lVitnesses:

ALBERT H. ADAMS, HARRY T. JoNEs.

